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Pré-Publication, Document De Travail Année : 2018

Principal-Agent Problem with Common Agency without Communication

Résumé

In this paper, we consider a problem of contract theory in which several Principals hire a common Agent and we study the model in the continuous time setting. We show that optimal contracts should satisfy some equilibrium conditions and we reduce the optimisation problem of the Principals to a system of coupled Hamilton-Jacobi-Bellman (HJB) equations. We provide conditions ensuring that for risk-neutral Principals, the system of coupled HJB equations admits a solution. Further, we apply our study in a more specific linear-quadratic model where two interacting Principals hire one common Agent. In this continuous time model, we extend the result of Bernheim and Whinston (1986) in which the authors compare the optimal effort of the Agent in a non-cooperative Principals model and that in the aggregate model, by showing that these two optimisations coincide only in the first best case. We also study the sensibility of the optimal effort and the optimal remunerations with respect to appetence parameters and the correlation between the projects.
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Dates et versions

hal-01534611 , version 1 (07-06-2017)
hal-01534611 , version 2 (12-01-2018)

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Thibaut Mastrolia, Zhenjie Ren. Principal-Agent Problem with Common Agency without Communication. 2018. ⟨hal-01534611v2⟩
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